Isogeny from Two Curves

isogenies

asked 2020-02-16 17:52:13 +0200

Taylor Huang
51 ●2 ●7

Hi, I was wondering given two curves $E_1,E_2$ $\ell$-isogeneous where $\ell$ is some prime. Do we have anything in Sage that help us compute its itermediate isogeny?

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rburing ( 2020-02-18 14:03:42 +0200 )edit

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answered 2021-11-03 23:01:57 +0200

Luca
870 ●5 ●21

E1.isogeny(E2, ell) works if the isogeny between E1 and E2 is a Vélu isogeny, but there is nothing for the general case.

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Asked: 2020-02-16 17:52:13 +0200

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Last updated: Nov 03 '21

Isogeny from Two Curves edit